Just installed Windows 7 Ultimate from XP using the instructions provided in upgrade packet. Now my optiarc DVD RW AD-7910S won't work (have a Lenovo ThinkPad T400) - I've tried uninstalling/reinstalling, running checkdisk, driver says that it is updated when I try to update it, etc. When I go to Device Manager the error msg I receive is: Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39) Other problem is that I use Magic Jack and the Magic Jack drivers will not install. Had no problems with either of these in XP. Any ideas?